Global Patent Index - EP 2114749 A4

EP 2114749 A4 20100707 - STAIR-CLIMBING WHEELED VEHICLE

Title (en)

STAIR-CLIMBING WHEELED VEHICLE

Title (de)

RADFAHRZEUG ZUM TREPPENSTEIGEN

Title (fr)

VEHICULE SUR ROUES POUR ESCALIER

Publication

EP 2114749 A4 20100707 (EN)

Application

EP 08725495 A 20080212

Priority

  • US 2008001870 W 20080212
  • US 90081307 P 20070212
  • US 2116708 P 20080115

Abstract (en)

[origin: WO2008100524A2] A wheeled vehicle comprising a power-driven spider assembly for ascending and descending stairs. The vehicle includes an angular position sensor providing input to a controller operable to control a servo-motor to effectively lock the position of the spider relative to the frame, regardless of the hand truck's spatial orientation relative to a vertical plane, or any balancing of the hand truck. The angular position sensor provides input to the controller, which is programmed with predefined angular zones of instability, and causes the controller to accelerate rotation of the spiders through those zones when the wheeled vehicle is in the descent mode, to avoid instability of the hand truck. A hand truck may include a removable basket and/or a pivotable platform usable to transport loads.

IPC 8 full level

B62B 5/02 (2006.01); B62B 9/02 (2006.01)

CPC (source: EP US)

B62B 5/0033 (2013.01 - EP US); B62B 5/0069 (2013.01 - EP US); B62B 5/026 (2013.01 - EP US); B62B 5/065 (2013.01 - EP US); B62B 5/066 (2013.01 - EP US); B62B 2202/12 (2013.01 - EP US)

Citation (search report)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

DOCDB simple family (publication)

WO 2008100524 A2 20080821; WO 2008100524 A3 20081009; CA 2677620 A1 20080821; EP 2114749 A2 20091111; EP 2114749 A4 20100707; JP 2010534156 A 20101104; US 2009133517 A1 20090528

DOCDB simple family (application)

US 2008001870 W 20080212; CA 2677620 A 20080212; EP 08725495 A 20080212; JP 2009549146 A 20080212; US 25485408 A 20081021